My 57 split has started to jump out of 4th. Im going to take out the box and strip it. My problem is that while waiting for parts its going to block up the workshop so I need the parts quick. The gearbox came from a 59 panel, but Im not even sure that was original. Checking all the usual suspects in the UK the only parts they do are 60> so I have been trying to identify the age of the box. its a bolt on front mount and the stamped number is H3 862 429. All my searches have turned up nothing so far

Just searching and it would appear that if the synchro gear for 3rd and 4th has gone there may well be a way of modifying it by grinding some of the teeth off, I wonder if anyone has any more information on the process??

My 57 split has started to jump out of 4th. Im going to take out the box and strip it. My problem is that while waiting for parts its going to block up the workshop so I need the parts quick. The gearbox came from a 59 panel, but Im not even sure that was original. Checking all the usual suspects in the UK the only parts they do are 60> so I have been trying to identify the age of the box. its a bolt on front mount and the stamped number is H3 862 429. All my searches have turned up nothing so far

A H-code should be a very late splitty box (1967, I think). That's what a previous owner fitted to my truck.

Measure the rear hub nut. If it's 46mm, it's definitely a later box._________________Andy

My 57 split has started to jump out of 4th. Im going to take out the box and strip it. My problem is that while waiting for parts its going to block up the workshop so I need the parts quick. The gearbox came from a 59 panel, but Im not even sure that was original. Checking all the usual suspects in the UK the only parts they do are 60> so I have been trying to identify the age of the box. its a bolt on front mount and the stamped number is H3 862 429. All my searches have turned up nothing so far

A H-code should be a very late splitty box (1967, I think). That's what a previous owner fitted to my truck.